linux-kernel - Re: v3.11-rc1 USB regressions

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Date:	Tue, 16 Jul 2013 11:22:47 +0300
From:	Felipe Balbi <balbi@...com>
To:	Felipe Balbi <balbi@...com>
CC:	Kishon Vijay Abraham I <kishon@...com>,
	Daniel Mack <zonque@...il.com>,
	Aaro Koskinen <aaro.koskinen@....fi>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	<linux-usb@...r.kernel.org>, <linux-omap@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: v3.11-rc1 USB regressions

On Tue, Jul 16, 2013 at 11:08:36AM +0300, Felipe Balbi wrote:
> Hi,
> 
> On Tue, Jul 16, 2013 at 12:30:00PM +0530, Kishon Vijay Abraham I wrote:
> > On Tuesday 16 July 2013 12:03 PM, Daniel Mack wrote:
> > > Hi Aaro,
> > > 
> > > On 16.07.2013 00:56, Aaro Koskinen wrote:
> > >> Hi,
> > >>
> > >> I think USB tree introduced regressions in v3.11-rc1, at least for some
> > >> OMAP devices using legacy boot.
> > > 
> > > Thanks for checking the tree so early.
> > > 
> > >> I have only bisected these; I have no
> > >> idea what the real fixes are but the following reverts make Nokia OMAP2+
> > >> boards again usable for kernel development work (they need working USB
> > >> connection for interacting with the device):
> > >>
> > >> 1) USB peripheral mode (g_ether) is broken on Nokia N900, N950 and N9
> > >>    (USB_MUSB_OMAP2PLUS). To make it it work, I need to revert three
> > >>    commits:
> > >>
> > >> 	09fc7d22b024692b2fe8a943b246de1af307132b
> > >> 	usb: musb: fix incorrect usage of resource pointer
> > >> 	(Reverting this fixes the g_ether probe failure "couldn't find
> > >> 	 an available UDC")
> > 
> > I've posted a patch fixing the issue
> > http://comments.gmane.org/gmane.linux.usb.general/89541
> > There were some comments on it. I'll be posting a new version for it.
> 
> hmm, n8x0 used tusb6010, so perhaps a similar patch needs to be cooked
> for that too. Right now, let's to the minimum fix, which is just to
> increment the array size to 3 and for v3.12 we do the changes that I
> suggested.

this should solve the problem on n900 and n8x0, it's pretty much
kishon's original patch, so I guess it deserves his authorship:

diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c
index 6708a3b..f44e8b5 100644
--- a/drivers/usb/musb/omap2430.c
+++ b/drivers/usb/musb/omap2430.c
@@ -481,7 +481,7 @@ static u64 omap2430_dmamask = DMA_BIT_MASK(32);
 
 static int omap2430_probe(struct platform_device *pdev)
 {
-	struct resource			musb_resources[2];
+	struct resource			musb_resources[3];
 	struct musb_hdrc_platform_data	*pdata = pdev->dev.platform_data;
 	struct omap_musb_board_data	*data;
 	struct platform_device		*musb;
@@ -581,6 +581,11 @@ static int omap2430_probe(struct platform_device *pdev)
 	musb_resources[1].end = pdev->resource[1].end;
 	musb_resources[1].flags = pdev->resource[1].flags;
 
+	musb_resources[2].name = pdev->resource[2].name;
+	musb_resources[2].start = pdev->resource[2].start;
+	musb_resources[2].end = pdev->resource[2].end;
+	musb_resources[2].flags = pdev->resource[2].flags;
+
 	ret = platform_device_add_resources(musb, musb_resources,
 			ARRAY_SIZE(musb_resources));
 	if (ret) {
diff --git a/drivers/usb/musb/tusb6010.c b/drivers/usb/musb/tusb6010.c
index 2c06a89..6f8a9ca 100644
--- a/drivers/usb/musb/tusb6010.c
+++ b/drivers/usb/musb/tusb6010.c
@@ -1156,7 +1156,7 @@ static u64 tusb_dmamask = DMA_BIT_MASK(32);
 
 static int tusb_probe(struct platform_device *pdev)
 {
-	struct resource musb_resources[2];
+	struct resource musb_resources[3];
 	struct musb_hdrc_platform_data	*pdata = pdev->dev.platform_data;
 	struct platform_device		*musb;
 	struct tusb6010_glue		*glue;
@@ -1199,6 +1199,11 @@ static int tusb_probe(struct platform_device *pdev)
 	musb_resources[1].end = pdev->resource[1].end;
 	musb_resources[1].flags = pdev->resource[1].flags;
 
+	musb_resources[2].name = pdev->resource[2].name;
+	musb_resources[2].start = pdev->resource[2].start;
+	musb_resources[2].end = pdev->resource[2].end;
+	musb_resources[2].flags = pdev->resource[2].flags;
+
 	ret = platform_device_add_resources(musb, musb_resources,
 			ARRAY_SIZE(musb_resources));
 	if (ret) {

-- 
balbi

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